Surface indicator



Jan,` 2,1923

M. A. SMITH ET AL. SURFACE INDIATOR. FILED'OCT. I8. 1919.

1,441,129 Fier..

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MILTON ya. sranrlr ,erin svn-Vanns w; Biaowii, i or woons'ociinr, linens IsLANn;

sein WBROWN .assis-Non SOCKET, iai-ions i'snnnn.

or ALL Hrs/meier 'To CHARLES L. HALL, or woon- SURFACE INDICATOR.

Application filed October 18, 1919. Serial No. 331,577.

in the county of Providence and State ot Rhode island, have invented certain new and useful Improvements in Surface Indi cators, of which the following is a specification.

This invention 'relatesto improvements in surface indicators; and has for its object to provide such a device which will indicate` inaccuracies in the surface of w'ork;

A 'further object of the inventionl is to provide a surface indicator whereby either a relative longitudinal or 'transverse .moven ment of the tree end of the feeler member of the indicator causes the degree of inaccuracy to be shown on a graduatedsurface. .By this construction the device may be employed to indicate the inaccuracies or the amount the work is out of true either on its outer surface or onits inner surface,

such as a hole or the like into which the ieeler member may extend.

With these and other objects in view, the

invention consists of certain novel eatures i 'of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Figure l-is a perspective View illustrating our improved surface indicator positioned to engage the outer surface of a cylindrical piece of work.

Figure Q-is a side elevation of the instrument partly in section and with the side of the casing removed, showing the internal mechanism.

Figure 3-is a central vertical section of the device.

Figure /l-is a perspective view o'l` the block which engages the motion multiplying lever.

Figure 5ris perspective view of the motion 'multiplying lever. l

Referring tio the drawings, l() designates the body portion ofthe indicator, which is preferablyY formed hollow with a cover 'il secured to one face thereof by screws 12. in this casing is mounted a pointer-arm 13, its lower end being bent into U-shape as at 14 and pivoted onwthe small pin i5 which is supported. in the trunnion member 16.

- The upper end of this armextends through pointed at 17 to reachover the graduated surfacelS of the body-portion. Y

A movement-multiplying lever 20 is pivoted at itsjupperk end at 21 and is arranged to extend downwardly, its lower end engaging the pin 22 inthe pointer-arm 13 The upper end of this lever is providedwith two distinct knife edges 23 and 24: whichserve 'as thrust bearings set to receive 'thrusts directed at right anglesy to each other. In rother words, 'the edge 23 is to receive,y the longitudinal thrust of the feeler member, presently described, while the edge 24 is to receive the thrnstotl a transverse movement ot the free end of the feeler member, either of which thrusts serves to move the pointerf arm overthe graduated face of the indicatorgbody through the motion ol? the move- 1nent-multiplying lever 20. l

A. spring 'Q5 is provided to press, the pointer-arm to the vleft `of the y'graduated slot where it normally stays when the device is not inuse. d y -v n,

'A tubular nose-member 26 isv threadedjat 27 into the opening 28 ingthe body-portion and a feeler spindle 29 of a` diameter less `than that of the internal. diameterof the nosebody, is mountedto extendfthrough said nose-member; the outer end 30 of this spindle being provided with an enlargement and the inner end 3l ispthreaded into a block 32, which block is provided with an end thrust surface 33 which engages the knife edge 23 and ain upper vthrust surface 34 which engages the corresponding knife edge 24C of the movement-multiplying le-y ver 20. n

Midway between the thrust edge 24: and the outer edge of the enlargement k3() we have mounted a collaror enlargement 35 on the feeler spindle, the outer surface of the collarfbeing rounded so as to permit a i rocking' motion of the spindle in the tubular nose. n

yIn some instanceswhen itis desired to obtain a lon'g feeler member suchas illustrated 36, in dotted lines, it is only necessary to remove the shorter spindle `and screw in the klonger vspindle the fulcrumedpoint of the latter being at 42 or exactly-midway between the knife edge and the edge 37 1 does not chantre the proportional motion ot the lfeeler and pointer, in order to hold the spindle engaging' block 3Q and the spindle back in position normally in contact 'with the knit'c edges and 24h `we have provided a light spring' 3S, one end of which engages an opening 39 in the casing while the other end enga-ges a slot et() in the und r side et the block.

Sui-tace indicators ot this character are usually mounted rigidly upon a supporting bar, but it is found in practice to be of advantage to adjust the body et the indicator relative to this'supporting` bar. Therefore ive have provided a link-member l-. which is pivoted at one end 5() to the body ot' the indicator and at its opposite end to the supporting-bar 53 whereby the bar may be rigidly secured to a face-plateraor held in the usual tool post (not shown).

In setting the indicator the bar o?) mountedin its holder and the teeler Q9 is positioned against the vferl.: vwith sutli.- cient pressure to bring the pointer 17 to Zero in the center ot its slot as illustrated in Figure l. Any pro-tuberance on the surface ot the Work beyond this point will move the pointer in one direction .vhile a depression will move the pointer in the opposite direction. In other words as the surface ot the Work advances in contr with the teeler the extent et the inacour; is indicated by the pointer moving); over the `graduated surface.

By ourimproved construction the body ot the indicator may be moved back and torth relative to the Work 55 without the necessity ot adjusting the bar or the member to which the bar is attached.

The device is extremely simple and practical in its construction and etiicientv in its operation.

The foregoing description is directed solely towards the construction illustrated, but We desire it to be understood that ive reserve the privilege of resorting; to. all the mechanical changes to which the device is susceptible the invention being; dch'ned und limited only by the terms et the appeluled claims, l

le claim 1 L A sul *ace truing indicator. having? a graduated scale`^ a pointer to cooperate rvith 'the scale a teeler member having; a louisitudinal movement and a transverse movement, means to receive the thrust troni the longitudinal movement o t' the teeler, und other means vfor receiving;` the transverse movementot' the ieeler, both ot said .mea-ns transmittingl the movement ot t-he feeler to move the pointer proportionately over said graduated scale.

i 2. A surface truing indicator comprising a lmdy portion having` a graduatei'l scale, a pointer to cooperate with said scale, z: teeler member mounted in said body having a lon- `gitiuilinal movement and a transverse movement, a. movement-multiplyinglever mounted in said body and havinijY means to receive the thrust troni the longitudinal movement ot the lfeeler and having other means to receive the thrust from the transverse movement ot the teeler, said lever being' engageable with said pointer to more the saine over the graduated scale proportionately to the movement of said teeler.

3. A surface truing indicator as set itorth in claim Q, further characterized by spring' means normally urging' the pointer to one position and maintaining the pointer and said lever in Contact, and other springr means for yieldably maintainingthe vteeler and said thrust receiving' means in contact. l, A surface truing indicator comprising a member having'l a graduated scale thereon5 a pivoted pointer mounted in the bony member to cooperate with said scale, a lever pivoted within the body and having its distal end adapted to engage the pointer, a slidable member mounted to engage the lever adjacent its pivoted end to move the lever on its pivot, and a Yleeler member dctachably connected to said slidable member, said 'lfeeier member being mounted in the body to have a longitudinal sliding movenir-nt and a transverse rocking movement which isy transmitted to said pointer through said slidable member and said lever.

o. A surface indicator comprising` a body havinga graduated scale thereon7 a pointer, a inovement-multiplyinglever mounted in said body said lever being?)v provided With two distinct thrust points set to receive thrusts directed at right angles to each other5 a feeler spindle operatively mounted to engage either of said thrust points et said lever to move said pointer proportionally over said graduated scale. y

6. A surface truine; indicator as set ttor-th in claim el further characterized by the lever having` independent means vtor receiving the thrust of the longitudinal movement and the thrustot the transverse movement oi" the ll teeler and said s lidahle member having;Y iuilependent uien, At :fable with the independent ineans et said lever1 and inea i tor yieldably mainteming;` said slidable member in Contact with d means on the lever, 12o

A surtare indicator cormprieinn a body member havingT a pjrzuluated scale thereon a pointer to cooperate with said scale and curried by said body member, a Veeler mounted on said body having` a longitudinal movement and a transverse movement. a movement multiplying lever mountedou said body and having a means to receive the thrust from said longitudinal and other means to receive the transverse movements of the teelei, and. means between said lover and pointer for tiyyisinitting the inovement of said eeler to said pointer.

8. di snriace indicator comprisingv a body member having a graduated scale thereon, a pointer having one end portimi. pivot-ally mounted to said body member, a; lever having one end portion. pivotally mounted to said .body member and having its distal end eiigjageable with said pointer adjacent its pivoted end, yieldable means normallymaintaining said pointer andsaid lever in engagement, a 'teeler element slidably mounted in the body member and having means thereon tor permitting it to lave tree oscillating movements transvfersely or" said slidine; movement thereon, yieldable means for maintaining a portion ot said eeler in engagement with said lever at its pivoted end, and means between the said feeler and said lever for transmitting the movements of said eeler to said lever.

9. A surface indicator vcomprising a bodyy ends and in contact with said walls of thel said bore, whereby the teeler will admit of tree oscillating movements on said enlargement, yieldable means for maintaining a portion ot said teeler in engagement with said lever at its pivoted end, and means between the said teeler and said lever iior transmittingthe movements ot said eeler to said lever.

i0. A surilace indicator comprising; a casii1;i',fa pointer ha ving' one end bent upon itsel li to a substantially U-shaped formation and having; an indicating' member on` its other end. scale on said casing` with which said indicatorcooperates, a pivot pin extending through said lirst mentioned end et said pointer, a level.' liaving` one end pivoted in said casing' and having its other end tending between said U-shaped portions of the pointer, a lug between said iii-shaped end oit said pointer and carried by the latter with which said lever engages, an elongated i'ieeler mounted in` said tubular bearingand having' a longitudinal sliding movement and a transverse pivotal movement therein, means on the outer end oit said ieeler .tor engaging;- the work, projections on the inner end oi' said ife'eler tor engaging the pivotal end ot said lever, said lever having a surface thereon engageable by one of said pro pointer to cooperate with said scale and car-k ried; by said body member, a movement muly tiplying` levermounted on said body member, lmeans between said lever and pointer ior "transmitting the movements oit said lever to said pointer, a iteeler mounted on said body member having` longitudinal movement and a transverse movement, and means to receivevthe thrusts trom said longitudinal and transverse movements ot the i'eeler for moving the lever in one direction by the transverse movements and in another direction by the longitudinal movements of said teeler, whereby the pointer is moved in dii:- 'ierent directions from' a given point on the scale according to the -movement oi' said iteeler. i

12. A surface indicator comprisinga body member having' a graduated scale thereon.' a pointer mounted on the body member to cooperate with said scale, a lever mounted on the body member, means between said lever and pointer tor transmitting 'the movements of said lever to the pointer, a eeler mounted on the body member and having a longitudinal movement and a transverse movement, means on the eeler for engaging; the lever and actuating;` the lever in one direction when the eeler moves longitudinally` other means on the feeler for engaging the lever and 'actuating the lever in ain other direction when the fee-ler ymoves transversely, and means on the 'teeler for engaging the work, said pointer being adapted to be moved to an intermediate setting position on the scale when the teelei' is in oper ative contact with the work.

13. A surface indicator comprising a body member having; a graduated tace, an indieating` pointer cooperating with said Jface, a teeler rod having an enlarged itulcrum point intermediate its ends dividing; it proportionally, an elongated Ylnlrruin bearingr member ou the body on which the enlargelnent adapted to roi'il or slide, pointer -llO operating` mechanism coimectini said teeler and said pointer to operate the latter when the feeler is either moved longitudinally or rocked on its 'lnlcruin, and means itor removably connecting the teeler rod to the pointer operating mechanism whereby similar teeler rods oit diilerent (merating lengths may be employed.

la. AY surface indicator comprisingl a bodyl member havinga graduated tace, an indieating pointer cooperating with said face, interchangeable teeler rods of dierent lli)k lengths enoh having en enlarged itulorum point illteriiledizxte its ends dividing the rod proportionally, such proportional division of diii'yereiit rods being the seme, ail elongated lfulcruiii bearing tube fixed to Seid body in which one of seid rods may be selectively mounted :uid in which the enlargement of seid .rod is adapted to either rook or slide, pointer operating mechanism connecting said feeler rod and said pointer to operate the latter When the feeler is moved longitudinally or rocked on its ulerum, and` means for removably connecting the feeler rod to the pointer operating mechanism whereby rodsrof different operating lengths il 5 MILTON A. SMITH. SYLVANUS W. BROWN.

VitneS/ses EDWARD F. GODDARD, EMERY P. LEWIS. 

